Census Data

The files presented here are based on U.S.
Census Bureau Tiger files. The eight counties that surround Lake Tahoe
are divided into a numerous Census
tracts that include from 2,500 to 8,000 people. They were taken for
the SEDAC web site
for Census Data download called DDCarto.
They were imported into ARC/INFO, combined to cover the Lake Tahoe area,
projected into UTM zone 10 NAD27 and converted to Shape and SDTS file
formats.

Data Download

The following Census data have been mosaicked together from the 18 7.5-minute
quadrangles that cover the Lake Tahoe Basin. The mosaicked files are more
convenient for looking at areas throughout the basin or areas on the edge
of two quadrangles.

Census data are in UTM NAD27 zone 10 projection. Raw (original)
data are in the following projections: data east of 120 degrees longitude
are in UTM zone 11 and data west of 120 degrees longitude are in UTM zone
10. It is not possible to combine different projections in Geographic
Information System (GIS), therefore, all data have been reprojected into
one standard projection, UTM NAD27 zone 10 projection, for the Lake Tahoe
Basin.

The following Census data are stored in three different file formats,
each contain the same information: